Use a different map to distinguish eval contexts

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/code-stub-assembler.h"
@@ skipping 843 matching lines @@
   static compiler::Node* Generate(CodeStubAssembler* assembler,
                                   compiler::Node* shared_info,
                                   compiler::Node* context);
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewClosure);
   DEFINE_TURBOFAN_CODE_STUB(FastNewClosure, TurboFanCodeStub);
 };
 
 class FastNewFunctionContextStub final : public TurboFanCodeStub {
  public:
-  explicit FastNewFunctionContextStub(Isolate* isolate)
-      : TurboFanCodeStub(isolate) {}
+  explicit FastNewFunctionContextStub(Isolate* isolate, bool for_eval)
+      : TurboFanCodeStub(isolate) {
+    minor_key_ = ForEvalBits::encode(for_eval);
+  }
 
   static compiler::Node* Generate(CodeStubAssembler* assembler,
                                   compiler::Node* function,
                                   compiler::Node* slots,
-                                  compiler::Node* context);
+                                  compiler::Node* context, bool for_eval);
 
  private:
   DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewFunctionContext);
   DEFINE_TURBOFAN_CODE_STUB(FastNewFunctionContext, TurboFanCodeStub);
+
+  int for_eval() const { return ForEvalBits::decode(minor_key_); }
+  class ForEvalBits : public BitField<bool, 0, 1> {};
 };
 
 
 class FastNewObjectStub final : public PlatformCodeStub {
  public:
   explicit FastNewObjectStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewObject);
   DEFINE_PLATFORM_CODE_STUB(FastNewObject, PlatformCodeStub);
 };
@@ skipping 1863 matching lines @@
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 extern Representation RepresentationFromMachineType(MachineType type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_